y= e^2x(cosx) a) Show that dy/dx=e^2x (2cosx-sinx) b) Find (d^2)y/dx^2 AT the point P (a,b), (d^2)y/dx^2=0 c)Use the results from parts a and...

y= e^2x(cosx) a) Show that dy/dx=e^2x (2cosx-sinx) b) Find (d^2)y/dx^2 AT the point P (a,b), (d^2)y/dx^2=0 c)Use the results from parts a and b to prove that tan a=3/4 and the gradient of the curve at P is e^2a